Lloyd



Jan. 24-, 1956 c. LLOYD SLIDING DOOR, LOCK 2 Sheets-Sheet 1 Filed Aug. 26, 1952 INVENTOR Claire Lloyd.

ATTORNEY 24, 1956 c. LLOYD 2,731,821

SLIDING DOOR LOCK Filed Aug. 26, 1952 2 Sheets-Sheet 2 INVENTOR Claire Lloyd '1' m I m ATTORNEY United ttes Patent SLIDING D0011 LOCK Claire Lloyd, West Palm Beach, Fla.

Application August 26, 1952, Serial No. 366,352

2 Claims. ((11. 70-100) This is a continuation-in-part of my co-pending application for patent Serial No. 720,366, filed January 6, 1947, now Patent No. 2,615,742.

This invention relates to fasteners for sliding doors, and more particularly to features of construction which lend themselves to incorporation in either a fastener for more or less temporary privacy, or a lock for more positive security.

Sliding doors and swinging doors, are of course, well known, but sliding doors are preferable to doors of the swinging type where conservation of room space is of importance. The present inventon has an important application to sliding doors for bedrooms, bathrooms, closets and similar enclosures where the corners or wall space of the room are left free for the placing of furniture or other objects. However, it is also possible to use sliding doors not only in homes, and commercial and industrial buildings, but also on trains, airplanes, trailers, and other places and this invention is to be broadly construed as applicable to sliding doors generally, irrespective of where they are used, the above examples being for illustrative purposes only.

An object of the present invention is the provision of locks having a novel arrangement of parts and being especially adapted for use on sliding doors.

Another object of the invention is the provision of a basic lock structure for sliding doors which can be used for and is readily adaptable to a variety of different actuating mechanisms.

A further object of the invention is the combination of a basic lock structure of the type mentioned with an actuating mechanism adaptable to the stem type of key, that is, a key having a stem, collar and pin in axial alignment and an offset bit attached to the pin.

A still further object is the combination of such a basic lock structure with an actuating mechanism of the cylinder type.

A still further object of the invention is the provision of such a basic lock structure which can be actuated by a permanently attached or removable insert member as a sole means of actuating the lock mechanism or in addition to other key actuatable mechanisms.

Other objects include the provision of devices of the type mentioned which are long wearing, positive in their operation, sturdy in construction, simple and economical to manufacture, and which are dependable and secure in their functions as security locks.

These and other objects and advantages of the invention will be apparent from the following description considered together with the accompanying drawing.

In the drawing:

Fig. 1 is a perspective view of a portion of a sliding door, showing the general relation between it and an embodiment of the invention disposed therein.

Fig. 2 is an elevational section of a special embodiment of the invention mounted in a door showing a form of basic lock structure in combination with a mechanism actuatable by the stern type of key.

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Fig. 3 is a section along the line 3-3 of Fig. 2.

Fig. 4 is a view similar to Fig. 2 showing a variation of the embodiment.

Fig. 5 is a view similar to Fig. 2 showing a modified embodiment of the invention as the combination of the basic lock structure with actuating mechanism of the cylinder lock type.

Referring with more particularity to the drawing in which like numerals designate like parts, the embodimentv illustrated in Figs. 1, 2 and 3 comprises a hollow casing, generally designated by the numeral 11, preferably of rectangular shape, having front and rear walls, 12 and 13, and a face plate 14. The casing is adapted to be disposed in the usual manner in a mortise recess of the sliding door 15 and secured in position by screws 16 and 17 engaging vertical flanges 18 and 19 of the face plate 14.

In the upper part of the casing there is pivotally mounted a gear segment 20, having teeth 21, on a stub shaft 22. Extending from the segment 20, as an integral part thereof, is a shank 23, the outer end of which is shaped in the form of a hook 24. When the shank 23 is in the horizontal position, as shown in Fig. 2, the hook extends through a rectangular slot 25 of the face plate 14, beyond the edge of the door, to engage a member (not shown) in the door jamb when the door is in the closed position, such means being already well known in the art. In its lower, unlocked position, the opposite side 26 of the hook, which is concave, abuts the pivoted inner end 27 of a door pull out member 28. In this position, the hook is fully retracted in the slot 25 and the outer edge 29 is fiat and flush with the face plate 14. Said member 28 is pivoted on a pin 30 and includes an elongated shank 31 having an outer flat surface edge 32 which, like the edge surface 29 of the hook, seats within the casing, flush with the door face 14. When in retracted position, the door pull may be pivoted outwardly from the casing by engaging a finger or finger nail under a formed lip 33 at the end of the shank.

The teeth 21 of the gear segment 24 are in mesh with teeth 34 of a semi-gear 35. The hub 36 of the said semigear has circular bosses 37 and 38 projecting, one on either side thereof, and which are rotatably carried in bearings 39 and 40 of the front and rear walls 12 and 13, respectively. The center of the hub is provided with a non-circular hole, such as the square hole 41, which is adapted to receive a permanent or removable shaft 42 of similar cross-section for the purpose of manually rotating the semi-gear 35. The shaft is provided with finger or wing grips 43 or other suitable means, to facilitate its manipulation. A set screw 44 is provided in the semigear to permit securing of the shaft thereto, if desired. It is apparent, however, that the semi-gear may be rotated by the insertion of a screw driver or other similar tool in the hub hole 41.

From the above, it is evident that the rotation of the semi-gear in one direction will turn the gear segment 20 and throw the hook 24 into locked position, while rotation in the opposite direction will cause the hook to be retracted within the casing to the unlocked position.

In order to secure the lock against unauthorized use, a key actuatable mechanism is employed. One such mechanism is illustrated in Fig. 2 for the use of the stem type of key. This mechanism comprises a horizontal rack bar 45 which is slidably mounted beneath the semigear 35 and has its rack teeth 46 meshing with the teeth of the semi-gear, substantially as shown.

The rack bar 45 is mounted on a pin 47 and has an elongated slot 48 through which the pin projects and on which pivots a turnblerplate 49. The bar. 45 is held in the horizontal position by'means of the pin 47 and a lug or stub pin 62 projecting inwardly from the wall 12 into the slot 48. The tumbler plate is shaped so as to Wings;

3 cooperate with 3 lug 50- secured to and projecting from the bar 45 and a key bit notch 51 on the lower side of the bar 45 at the opposite end of the slot 48 from the pin 47'; For example, the plate '49 has a slot 52 with enlarged openings 53 and 54 at each end to'receive the lug 50 on the rack bar. As shown in Fig. 2, the bar 45 has been moved to the extreme left of the casing to en gage the ing 59 in the opening '53. The hook member 24 is in its uppermost position and, therefore, the device is in its locked position. Until moved to the ri'ght from this position by the bit of a suitable stem type key to be inserted in the key hole 55, the tumbler'plate 42 is yieldably urged downwardonto the lug 50 bya barsprin'g 56. The spring 56 iscur'ledat one end and anchored around the pivoted end of the plate 49 with its other end free, but in pressing engagement adjacent its free end against a stop lug or abutment 57, so as constantly to urge said tumbler plate downwardly over the lug on the bar '45, until it is raised by a suitable key in the notch of the bar.

Thus, to unlock the device, a stern type of key'to engage in notch 51 will raise the tumbler plate 49 on pivot pin 47 and unseat the lug 50 on the rack plate from back of the shoulder 58 formed by the opening 53 at the end of the slot 52. When this occurs, the lug 50 becomes aligned with the slot 52 and thereby permits the rack bar 45 to be moved to the right over the pin 47, until the lug rides out of slot 52 into the opening '54,'and the spring 56 urges and holds the tumbler plate 49 down on the lug 50, as the key leaves the notch 51 following a completeturn of the key.

The embodiment illustrated 'in Fig.4 is a modification of that shown in Figs. '1, 2 and 3. The rack bar 60 is provided with a horizontal slot 61which slidably engages a lug 62 secured to and projecting at right angles from a wall of the casing. The tumbler 63 lies on'one side of and is pivoted to the rack bar by. means of stub shaft 64 integral with and projecting from the rack bar. On the other side of the rack bar a boss 65 projects to slidably engage a slot '66 in the casing wall; By means of this arrangement the bar can be freely translated back and forth without binding. The resilient spring 67 is wholly carried by the rack bar, one end being secured in a slot 68 on the left "side of the pin '64, as viewed in Fig. 4, and the other end engaging an abutment pin 69 carried by and extending from the rack bar Consequfently, the rack bar, tumbler, and spring comprise a selfjcontained unit.

The peripheral edge of the semi-gear 70, opposite the gear teeth 71, may be provided with notches 72 and 73 for alternate engagement by a nipple 74 on the outer end of a spring loaded slide 75. The slide is carried between parallel diagonal arms 76 and 77 at'the adjacent corner of the casing and is constantly urged toward the semi-gear by the coil spring 78. Consequently, as the semhgear rotates from one extreme position to the other, the nipple 74 engages one of the notches 72 and 73 and yieldably holds the mechanism in position in addition to the holding action of the tumbler and in substitution of it if the rack bar unit is not used. Fig. 4 also shows the position of the bit 79 of a key 80 as it is entering the slot 81 of the rack bar to actuate the mechanism to the closed position.

The modification shown in Fig. 5 is similar to that shown in Fig. 4, except that the rack bar unit is omitted and in substitution thereof, there is provided a cylinder type of lock 82. This lock has a shaft 83 which can be rotated by inserting the proper key 84 in the key way thereof. A plate 85 carries a train of gears comprising an upper gear 86, an intermediate gear '87 and a lower gear 88. The shaft 83 is of anon-circular cross section or has a'portion thereof of non-circular crosssection to engage a correspondingly shaped aperture through the center of the upper gear 86. The lower gear 88 has secured to its center a shaft 89 projecting outwardly therefrom and having a non-circular crosssection or a portion thereof of a non-circular cross-section corresponding to that of the central aperture in the semi-gear 70 and in which it is disposed. By this arrangement, the semi-gear can be rotated by the key 84 acting through the shaft 83, gears 86, 87 and 88 and the shaft 89. In this embodiment, the arrangement of the notches 72 and 73 with the spring loaded member carrying the nipple 74, serves 'to releasably hold the mechanism in its locked and unlocked positions.

I claim:

1. A lock comprising a casing having parallel side walls and a face plate, said plate having a slot therethrough, said casing being adapted to be disposed in a mortise recess of a sliding door, a first gear pivotally mounted between and supported by said walls, a sec'o' nd gear meshing with said'first gear, said second gear 'hav ing an arm extending therefrom, said arm having a hooked outer and adapted to project through said slot in one position of rotation of said second gear and to retract within the casing in another position of rotation of said second gear, an abutment within the casingfor limiting the retraction of said hooked outer end "to a position substantially flush with said face plate, means for yieldably holding said second gear in different positions of rotation corresponding to said positions of said second gear, a key'actuatable mechanism, said mechanism including a slidable'rack connected to said first -gear.'

2, A lock comprising a casing having parallel sid Walls and a faceplate, said'plate having a slot therethrough, said casing being adapted to be disposed in a mortise recess of a sliding door, a first gear pivotally mounted between and supported by said'walls, a second gear meshing with said first gear, said second gear hav: ing an arm extending therefrom, said arm having a hooked outer end adapted to project through said slot in one position of rotation of said second gear and to retract within the casing in another position of rotation of said second gear, an abutment within the casing for limiting the retraction of said hooked outer end to a position substantially flush with said face plate, a rack bar slidably disposed adjacent said first gear, said vbar having rack teeth meshing with the teeth of said first gear, said bar having a longitudinal slot therethrough and, in spaced relation thereto, a projecting boss, a lug slidably disposed in said slot and secured to the casing, said casing having also a slot to slidably carry said boss, a tumbler plate pivotally mounted over said rack bar, said plate having a slot therein, about said lug,

yieldable means carried by said bar for rotatably urging said plate so that one side of the slot therein is inen gagement with said lug, said tumbler plate having a portion extending into said slot providing spaced shoulders for engaging said lug, and a key receiving notch in the rack bar belowsaid lug.

References Cited in the file of this patent 1 1e- 28. as: 

